Truss built patio cover

Hello,
I am planning on building a patio roof cover using trusses. The cover wii be 23 ft from the house and 16 feet wide. My question is can I use joist hangers to attach the two lvl joists to the rim joist of the house or do I need to install a ledger? I wii be supporting the lvl joist with 6 x 6 posts at 11.5 ft and 23 ft from the house